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Patent Searching and Data


Matches 1,251 - 1,300 out of 16,003

Document Document Title
WO/1987/001251A1
A brushless motor comprising a rotor which consists of a magnetic member or a permanent magnet, a stator having a stator core and a plurality of coils, a non-contact sensor for detecting the position of the rotor, speed detector means, e...  
WO/1987/001247A1
In a d.c. motor, the stator may form the armature and has its windings (2a, 2a1, 2B, 2b1, 2c, 2c1) inserted in slots in its cylindrical surface and the rotor may comprise a permanent magnet or be provided with d.c. windings (4a, 4b). Swi...  
WO/1987/000362A1
A pump, particularly for aquariums, is provided with an electric motor, a gyroscope driven by the electric motor, a water inlet manifold and a water outlet manifold connected to the gyroscope. The electric motor has a diametrically polar...  
WO/1986/006564A1
A pulsating current electromotor without commutator comprises a permanent magnet type or electromagnetic type rotor (11) keyed on a rotating shaft (12) and having the poles (14-18) diametrically opposite to one another relative to the sh...  
WO/1986/003629A1
A brushless motor comprising a magnetic rotor core (5) which has a plurality of rugged magnetic pole teeth maintaining a predetermined angular pitch, a stator core (1) consisting of a magnetic material which is opposed to the rotor core ...  
WO/1986/001049A1
Slotless and toothless wound stators are produced for electrical machines, in particular brushless DC motors, by providing temporary teeth at opposite ends of an iron cylinder (17) with smooth inner wall end-to-end, placing an electrical...  
WO/1986/001050A1
Signal processing units are more and more widely used as portable apparatuses or susceptible of being installed in very compact units. It is therefore necessary to obtain a face-to-face dimension which is further reduced and a decrease o...  
WO/1985/003958A1
A device for driving a sewing machine in which a brushless electric motor is used to drive the sewing machine, the brushless motor having a rotor made up of permanent magnets, and permitting the current-carrying phase of the stator windi...  
WO/1985/002951A1
A reluctance motor with windings for one or more phases, and arranged - for each phase - around two or more poles (3, 4, 5, 6). The stator (1) surrounds a rotor (2) incorporating two or more rotor poles (11). The invention is characteriz...  
WO/1985/002069A1
The commutator electric motor comprises a stator winding (7), a tacho-generator winding (9) and an annular permanent magnet (6) of a rotor. The permanent magnet (6) is so magnetized in an axial direction that it has two sets of alternati...  
WO/1985/001130A1
The interlocking device for stepping motor comprises a position detector comprised of an electret (4) which is integral with the rotor (1) of the stepping motor, of a fixed electrode (5) and of a detection circuit (6) responsive to the i...  
WO/1985/001158A1
In the electric machine, particularly an electric switch brushless direct current motor or tacho generator, preferably with permanent magnetic excitation and cold air-gap, the coils of the air-gap are divided into at least two partial co...  
WO/1984/003400A1
Electromotive machine of the type having a stator (14) and a rotor (15). The stator is provided with multiple sets of windings (quadrants 1:4, Fig. 1), each independently electrically coupled to an electrical means to establish separate ...  
WO/1984/003007A1
Improved brushless direct current (DC) motor for use in various applications, including disk drives in data processing applications. The improved motor includes a rotor portion (12), containing a ring magnet (22) with alternately radiall...  
WO/1984/002810A1
A three-phase brushless motor having magnetoelectric transducers for detecting the rotational position of a rotor (2) having a plurality of magnetizable regions, two of the magnetoelectric transducers being disposed in such a positional ...  
WO/1984/001863A1
A brushless direct current motor with the rotating magnet cup (43) permanently attached to the spindle hub (11). After attachment, the combination spindle hub and magnet cup are affixed to a shaft (10) and the resulting subassembly is dy...  
WO/1984/001477A1
A tachometer assembly for use with electrical rotary magnetic motors. The assembly includes a conventional brushless DC motor (12) having a radially polarized main field ring magnet (24) forming the rotor (16) about a stator (18). The ta...  
WO/1984/001062A1
The electric machine (1) comprises for the obtention of an excitation field at least one pair of permanent magnetic poles and at least one conductor track (7) which may be circulated by an electric current. The pair of magnetic poles is ...  
WO/1983/004146A1
Arrangement of a DC drive motor and a DC generator in an annular, flat DC motor generator. A conventional motor generator has drawbacks such as the requirement of a large installation space, an overall complicated apparatus, and a low ge...  
WO/1982/002803A1
A brushless, preferably coreless, DC motor or generator characterized by a positive, unidirectional, nearly constant torque. The machine in a preferred form comprises a rotor disc (16, 18) mounted for rotation with a shaft (2) and a stat...  
WO/1982/002619A1
An electric motor, for instance of limited angle type for driving a servo-actuator, has two or more motor units each including a wound stator within each of which is a respective rotor carrying spaced permanent magnets, the rotors being ...  
WO/1982/001252A1
In a D. C. generator type non-contact speed sensing device comprising a cylindrical rotor (1) with the magnetic N and S poles (N, S) alternating around the periphery and a stator (2) disposed confronting the rotor (1), the magnetic poles...  
WO/1982/001074A1
In a D.C. generator type non-contact speed sensing device including a cylindrical permanent magnet rotor (1) with N and S poles alternating around its periphery, a stator (2) with output windings (4) wound thereon confronting the rotor (...  
WO/1982/000548A1
A rotor position sensor comprises an armature (1) with signal sectors (5) and magnetic shunts (6) following one another and a stationary unit (7) provided with permanent magnets (8), each of them adjoining a magnetic circuit (9) with a p...  
WO/1981/001633A1
A motor system provides from a primary power source mechanical energy to an output shaft. The system has a plurality of electromagnetic devices (67A, 69A) mounted around a rotor for magnetically rotating it. A magnetic clutch (70, 72, 82...  
WO/1980/001898A1
The motor (72) includes a stator affixed to a motor housing (14).The stator has two sets of series connected coils (39a, 39b) (39c, 39d) wound in quadrature. Each set of coils is disposed in an annular configuration about a spin referenc...  
WO/1980/001525A1
In a direct current motor without collector provided with a permanent magnet rotor (11), a magnetisation of the rotoric poles (N, S) is used which differs considerably from the sinusoidal form. In addition to the main winding (35-47) use...  
JP2020513720A
本発明は、‐ロータ(15)と、‐前記ロー タ(15)に電磁的に磁場を発生させるため のコイル(17)を有するステータ(13) と、を含む‐ブラシレスDC電気モータ...  
JP2020072621A
【課題】その目的は、磁気検出素子の検出精 度の悪化を防ぐ駆動装置、および、これを用 いた電動パワーステアリング装置を提供する 。【解決手段】スイッチング素子121...  
JP2020068642A
[Subject] Commutator[ non-]-izing or by Brushless-izing, a direct-current machine with a high current capacity factor is provided for a direct-current machine which has many pieces of a commutator. [Means for Solution] direct-current mac...  
JP2020064018A
[Subject] An encoder including composition which can diagnose disconnection of a power generation element is provided, without carrying out erroneous detection in detection of many rotations. [Means for Solution] In encoder 100 of the pr...  
JP6686041B2  
JPWO2019049249A1
It drives by the 2nd system containing the 1st armature winding (71), the 1st system containing the 1st control device, and the 2nd armature winding (72) and 2nd control device, A permanent magnet type synchronous motor and an electric p...  
JP2020054184A
[Subject] Even when eccentricity arises at the time of rotor rotation, a motor which can reduce aggravation of rotation accuracy of FG signal is provided. [Means for Solution] A roofed cylinder-like rotor core which has a shaft to which ...  
JP2020054177A
[Subject] A housing provides the electric work machine which can control enlarging to the diameter direction centering on an axis. [Means for Solution] It has an electric motor and a housing and is an electric motor, A used machine style...  
JPWO2019049361A1
An electric motor is provided with a stator, a rotation child, and a magnetic sensor. A stator has an iron core and a magnetic flux coil. A rotation child has the axis of rotation and a cylindrical rotor magnet. A magnetic sensor has a s...  
JP6671460B2  
JP6662740B2  
JP6650302B2  
JP6648619B2  
JPWO2019150440A1
A magnet for detection with which a drive control system was formed in the perimeter of a rotation child of a motor and a motor along the hand of cut, and multiple 1st polar magnetic poles and 2nd polar magnetic pole have been arranged b...  
JP6641165B2  
JP2020010545A
To reduce magnetic sensors.The drive device for a three-phase rotary electric machine mounted on a vehicle, includes: a plurality of switching elements for energizing through switching operation a three-phase winding of the three-phase r...  
JP6626960B2  
JP6626632B2  
JP6626212B2  
JP2019213417A
To reduce thrust electromagnetic force and fluctuation of a motor having such a specification that the lowest common multiple of the number of poles including skew structure and the number of slots is small.A brushless motor 2 has a quad...  
JP2019208347A
To sufficiently reduce cogging torque in rotating electrical machines.A plurality of magnetic pole portions 220 are provided in the circumferential direction, and a first space portion 240 is formed between base portions 230 of a pair of...  
JP6615259B2  
JP2019205266A
To raise accuracy of detection by a magnetic sensor in a brushless motor.A brushless motor is provided with: a rotor 3; a stator 4; and a magnetic sensor 6. The rotor 3 has: a rotor core 31 which integrally rotates with a shaft 2; and a ...  

Matches 1,251 - 1,300 out of 16,003